Arrow is Lightweight library toolbox for Java and Android Development. Basically it groups utilites and helper classes commonly used for mobile development. Most of them have been extracted from popular java libraries like Guava
or Apache Commons
plus other stuff added myself. Refer to the Main Features section for a fully explanation of its capabilities.
Android Architecture using Google guides.
Integrated SocialLogin such as Facebook, Kakao, Naver, Line, Twitter, Google with RxJava and Firebase Authentication, written in Kotlin. This library is enhanced version of SocialLogin and fully rewritten in Kotlin and integrate with RxJava and Firebase Authentication.